'use strict';

const superagent = require('superagent');
const { v4: uuidv4 } = require('uuid');
const { reportBusinessCall, reportFastgptResponse } = require('../../services/dashboardReporter');

const getFastGptKey = (app, explicitKey) => {
   const config = app.fs.config.fastGpt || {};
   return explicitKey || config.reportAppKey || '';
};

const requestFastGptTextWithApp = async (ctx, textContent, options = {}) => {
   const app = ctx.app;
   const config = app.fs.config.fastGpt || {};
   if (!config.apiUrl) throw '未配置 fastGpt.apiUrl';

   const key = getFastGptKey(app, options.appKey);
   if (!key) throw '未配置 fastGpt.reportAppKey';

   const payload = {
      stream: false,
      detail: true,
      messages: [
         {
            role: 'user',
            content: [
               {
                  type: 'text',
                  text: textContent,
               }
            ],
         }
      ],
   };
   if (options.variables) {
      payload.variables = options.variables;
   }

   const res = await superagent
      .post(`${config.apiUrl}/api/v1/chat/completions`)
      .send(payload)
      .set({
         Authorization: `Bearer ${key}`,
         'Content-Type': 'application/json',
      });

   await reportFastgptResponse({
      ctx,
      applicationId: 'exp-report',
      actionId: options.actionId || `report:${res?.body?.responseData?.id || res?.body?.dataId || Date.now()}`,
      responseBody: res?.body,
      appKey: key,
      userId: options.userId,
      includeCall: false,
   });
   const content = res?.body?.choices?.[0]?.message?.content;
   if (!content) throw 'fastgpt 返回内容为空';
   return content;
};

const parseOutlineContent = (content = '') => {
   const safeContent = String(content || '').trim();
   if (!safeContent) return [];
   try {
      const parsed = JSON.parse(safeContent);
      if (Array.isArray(parsed)) return parsed;
      if (Array.isArray(parsed?.outline)) return parsed.outline;
      if (Array.isArray(parsed?.data)) return parsed.data;
   } catch (err) { }
   return safeContent
      .split(/\r?\n/)
      .map(line => line.trim())
      .filter(Boolean)
      .map(line => line.replace(/^\d+[\.\)\-、\s]*/, '').trim())
      .filter(Boolean)
      .map(name => ({ name, child: [] }));
};

const normalizeFastGptMessageContent = (content) => {
   if (typeof content === 'string') return content.trim();
   if (Array.isArray(content)) {
      return content
         .map(item => {
            if (typeof item === 'string') return item;
            if (typeof item?.text === 'string') return item.text;
            return '';
         })
         .filter(Boolean)
         .join('\n')
         .trim();
   }
   if (content && typeof content === 'object' && typeof content.text === 'string') {
      return content.text.trim();
   }
   return '';
};

const normalizeOptionalString = value => {
   const normalized = String(value || '').trim();
   return normalized || null;
};

const summarizeChartSnapshot = snapshot => {
   const seriesList = Array.isArray(snapshot?.seriesList) ? snapshot.seriesList : [];
   if (!seriesList.length) return '';
   const payload = seriesList.slice(0, 5).map(series => ({
      name: normalizeOptionalString(series?.name) || '数据',
      points: (Array.isArray(series?.points) ? series.points : []).slice(0, 30).map(point => ({
         x: point?.x,
         y: point?.y,
      })),
   }));
   return `图表数据:\n${JSON.stringify(payload, null, 2)}`;
};

const summarizeTableSnapshot = snapshot => {
   const columns = (Array.isArray(snapshot?.columns) ? snapshot.columns : [])
      .map(item => normalizeOptionalString(item?.title || item?.label || item?.field || item?.sourceField))
      .filter(Boolean);
   const rows = Array.isArray(snapshot?.rows) ? snapshot.rows.slice(0, 20) : [];
   const summary = snapshot?.summary || null;
   return [
      columns.length ? `表头: ${columns.join(' | ')}` : '',
      rows.length ? `明细行:\n${JSON.stringify(rows, null, 2)}` : '',
      summary ? `汇总:\n${JSON.stringify(summary, null, 2)}` : '',
   ].filter(Boolean).join('\n\n');
};

const summarizeKpiSnapshot = snapshot => {
   const metrics = Array.isArray(snapshot?.metrics) ? snapshot.metrics : [];
   if (!metrics.length) return '';
   return `KPI 指标:\n${JSON.stringify(metrics, null, 2)}`;
};

const summarizeBlockSnapshot = (block = {}) => {
   const blockType = String(block?.blockType || '').trim().toLowerCase();
   const snapshot = block?.contentSnapshot || {};
   if (blockType === 'chart') return summarizeChartSnapshot(snapshot);
   if (blockType === 'table') return summarizeTableSnapshot(snapshot);
   if (blockType === 'kpi') return summarizeKpiSnapshot(snapshot);
   return normalizeOptionalString(snapshot?.content) || '';
};

const analyzeBlockSnapshotWithPrompt = async (ctx, options = {}) => {
   const prompt = normalizeOptionalString(options?.prompt);
   const summary = summarizeBlockSnapshot(options?.sourceBlock || {});
   const blockType = normalizeOptionalString(options?.sourceBlock?.blockType) || 'block';
   if (!prompt) throw '缺少参数: prompt';
   if (!summary) throw 'AI 分析缺少可用的数据块快照';
   const actionId = options.actionId || `report-block:${uuidv4()}`;
   const content = await requestFastGptTextWithApp(
      ctx,
      [
         `请基于以下${blockType}数据快照完成分析。`,
         '如果数据不足，请明确说明。',
         `分析要求: ${prompt}`,
         '',
         summary,
      ].join('\n'),
      {
         actionId,
         userId: options.userId,
         variables: {
            type: 'ai分析',
            blockType,
         },
      }
   );
   await reportBusinessCall({
      ctx,
      applicationId: 'exp-report',
      eventId: actionId,
      traceId: actionId,
      userId: options.userId,
      reportContext: { action: 'block_analysis', blockId: options?.sourceBlock?.id },
   });
   return content;
};

module.exports.analyzeReportBlock = async (ctx, next) => {
   try {
      const { prompt, image } = ctx.request.body || {};
      const normalizedPrompt = String(prompt || '').trim();
      const normalizedImage = String(image || '').trim();
      if (!normalizedPrompt) throw '缺少参数: prompt';
      if (!normalizedImage) throw '缺少参数: image';

      const config = ctx.app.fs.config.fastGpt || {};
      if (!config.apiUrl) throw '未配置 fastGpt.apiUrl';

      const key = getFastGptKey(ctx.app);
      if (!key) throw '未配置 fastGpt.reportAppKey';

      const res = await superagent
         .post(`${config.apiUrl}/api/v1/chat/completions`)
         .send({
            stream: false,
            detail: true,
            variables: {
               type: 'ai分析',
            },
            messages: [
               {
                  role: 'user',
                  content: [
                     {
                        type: 'image_url',
                        image_url: {
                           url: normalizedImage,
                        },
                     },
                     {
                        type: 'text',
                        text: normalizedPrompt,
                     },
                  ],
               },
            ],
         })
         .set({
            Authorization: `Bearer ${key}`,
            'Content-Type': 'application/json',
         });

      const actionId = `report-image:${uuidv4()}`;
      await reportFastgptResponse({
         ctx,
         applicationId: 'exp-report',
         actionId,
         responseBody: res?.body,
         appKey: key,
         includeCall: false,
      });

      const content = normalizeFastGptMessageContent(
         res?.body?.choices?.[0]?.message?.content
      );
      if (!content) throw 'fastgpt 返回内容为空';

      await reportBusinessCall({
         ctx,
         applicationId: 'exp-report',
         eventId: actionId,
         traceId: actionId,
         reportContext: { action: 'image_analysis' },
      });

      ctx.body = {
         content,
      };
      ctx.status = 200;
   } catch (error) {
      ctx.logger.log(error);
      ctx.status = 400;
      ctx.body = {
         message: typeof error === 'string' ? error : 'AI 分析失败',
      };
   }
};

module.exports = {
   requestFastGptTextWithApp,
   parseOutlineContent,
   analyzeBlockSnapshotWithPrompt,
   analyzeReportBlock: module.exports.analyzeReportBlock,
};